List of top Agricultural Engineering and Technology Questions on Runoff Measurement Structures

Which of the following statements regarding basic equation for flow through the weir are correct?
(A). \(Q = 0.0186 L H^{2/3}\)
(B). \(Q = 0.0184 L H^{7/2}\)
(C). \(Q = C L H^m\)

Choose the correct answer from the options given below:
Which of the following statements regarding construction and installation of weirs are true?
(A). The velocity of approach of water to the weir should not be considered.
(B). Weir crest should be placed closer than 2H from the bottom of the channel.
(C). The head over the weir should be measured on the upstream side at a distance of at least 4 times the head of flow from the weir.
(D). The falling water surface from the weir should not have free flow.

Choose the correct answer from the options given below:
An error of 1 % in measuring head (H) will produce
(A) H-flumes are well suited for runoff measurement as they have a high capacity and are accurate at different rates of flow.
(B) They are also well suited where sediment sampling of the runoff is done using automatic silt samplers.
(C) The H-flume is useful for flows ranging from 0.009 to 0.85 cumec.
(D) For smaller and greater flows the dimensions of the H-flume are modified and are known as HS flumes for smaller flows and HL flumes for larger flows.
(E) H-flumes need not require calibration and the rating tables are to be used for measuring discharges.
Choose the correct answer from the options given below: